Struct ScaleDeviationTransform 

pub struct ScaleDeviationTransform {
    pub projection_coef: ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>,
    pub weighted_column_mean: ArrayBase<OwnedRepr<f64>, Dim<[usize; 1]>>,
    pub rescale: ArrayBase<OwnedRepr<f64>, Dim<[usize; 1]>>,
    pub non_intercept_start: usize,
    pub projection_ridge_alpha: f64,
}

Fields

projection_coef: ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>

weighted_column_mean: ArrayBase<OwnedRepr<f64>, Dim<[usize; 1]>>

rescale: ArrayBase<OwnedRepr<f64>, Dim<[usize; 1]>>

non_intercept_start: usize

projection_ridge_alpha: f64

Squared SVD truncation cutoff used when fitting projection_coef. Stored so prediction-time replay is reproducible without re-deriving the cutoff from heuristics.

Implementations

impl ScaleDeviationTransform

pub fn identity( p_primary: usize, p_noise: usize, non_intercept_start: usize, ) -> ScaleDeviationTransform

Identity (no-op) reparameterization: zero projection, zero centering, unit rescale. build_scale_deviation_operator with this transform returns the raw scale design verbatim, and the saved-payload round-trip replays the same identity at prediction time.

A location and a scale predictor remain SEPARATELY identifiable even when they share a covariate basis: they enter the likelihood through different sufficient statistics (the standardized residual versus its square / the log-scale), so residualizing the scale design against the location design — replacing X_σ with (I − P_{X_μ}) X_σ — imposes a spurious constraint and erases real heteroscedastic signal whenever the two blocks overlap. The Gaussian location-scale path already keeps its log-σ design un-residualized (identified_gaussian_log_sigma_design); this constructor lets the survival location-scale path do the same while preserving the transform plumbing (payload serialization, prediction-time replay).

Trait Implementations

impl Clone for ScaleDeviationTransform

fn clone(&self) -> ScaleDeviationTransform

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScaleDeviationTransform

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.